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Finding the Fourth Proportional to 220,242.94, 303,909.46 and 129,578.96

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Solution

The fourth proportional to 220,242.94, 303,909.46 and 129,578.96 is: 178,803.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,242.94 : 303,909.46 = 129,578.96 : x
  2. Step 2: Convert to fraction form
    220,242.94/303,909.46 = 129,578.96/x
  3. Step 3: Cross multiply
    220,242.94x = 303,909.46 × 129,578.96
  4. Step 4: Simplify right side
    220,242.94x = 39,380,272,196.79
  5. Step 5: Solve for x
    x = 39,380,272,196.79/220,242.94
  6. Step 6: Final answer
    x = 178,803.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.